Top feeding mechanism



May 10, 1932. v c. w. MUELLER 1,357,692

TOP FEEDING MECHANISM Original Filed Aug. 26, 1927 3 Sheets-Sheet 2 3nveutor Cfiarles WMwZZer,

w 0dr Gttorneg y 1932- I c. w. MUELLER 1,857,692

TOP FEEDING MECHANISM I Original Filed Aug. 2a. 1927 s Sheets-Sheet s 5.%m 7%z I attorney Patented May 10, 1932 UNITED STATES :j PA NT: 75;

CHARLES w. MUELLER, OF ST. LoiiIsMIssoUnI, ASSIGNOR T IiEwIs mvmma srr i orr MACHINE COMPANY, or sit. LOUIS, MISSOURI, nooeronerrronon MAINE 1 TOP FEEDING MEoHA'nI'sM This invention relates to new and useful improvements intop feeding mechanisms for blind stitch felling machines which are especially-adapted for felling a superposed layer upon a base layer of material. g The present invention is a divisional application of my application filed'Aug. 26, 1927,

SerialNo. 215,701, for lining felling ma- 6 the base layer or body fabric, being disposed at a considerable distance from the infolded edge of the lining and extending parallel with said infolded edge whereby the infolded edge portion or lining may afterwards be presseddownonto the baselayer and thereby cover the line of blindstitches.

I firstsuperpose a coat lining on the body fabricythen infold the marginal edge por tion of'the lining, and then secure said in folded edge portion to the bodyfabric along a line extending parallel with thefolded edge and at a considerable distance jtherefrom.

"fabric. a

The assembly islthen fed through the machine by my improved feeding mechanism with the'folded edge portion extending "upfor engaging and feeding the upturned marginal edge portionof theisuperposed layer past the sti ch forming-mechanism, acover for'the top feed'mechanism and manually operable means which project through the cover for quickly varying the feed stroke of the top feed mechanismwithoutthe'necessity of removin g the cover. a

With theseand other objects injviewwhich will more fully'appear, the nature of the in vention, will be more clearly understood by t Figure 2-is an endtelevation thereof, the cover. beingr'emoved fi of the drawings; a

; ferred to above T Original application filed August 26, 1'927,Seria1 No. 215,701. Divided and this application filed Marchlfl,

Inthe drawings: a

Figure 1 is anzenlarged front elevationof the stitching head and work supportof a sewingma'chine embodying thesubject matter of mylinvention," i

' p, a v a '60 Figure 4; is a detailed sectional vieWShowing the adjustable connectionin the top; feed mechanism for varying the feed stroke of the top feed dog, and

Figure 5 is a detailed 51 5 manv showing 65 the upper endof the feed lever-and the ada ,ju'stable link; connection therewith.-' y

Like reference numerals designate correspon dingparts throughout-the several figures r g The present invention herein as emb odied -in'a blind stitch sewing machine of the Lewis?; type; and, comprises a' later allyJeXtending Work arm 6,-man overhanging {arm 8, and a stitchingiheada which is secured 'ia to the free end -ofithe overhanging arm and is disposed above thQfQutI" end .ofthewwork ..arm.", I

- The' machine stitch foi jming V mechanism :whichl have indicated as a whole ee by the reference numeral 10-, and a Work presenting mechanismwhichl have indicated as a Whole by the reference numeral 11. :Both i thefstitch forming mechanism 10 and the work presenting mechanism 11 are operated from main rotary shaft 12-which: extends longitudinally of the overhanging arm 8 1 through the medium of "driving; connections i illustrated in my-copending application reh w p e n ng ;me ani i o i of; a mainzvpresser foot 14; which is. fixed to i the stitjchingfhead ;9,-; a Work. clamp 15 which cooperates with the ,work below the, inain presser foot, a lower feedingmechanism 16, an upper feeding mechanism lfi-a lower a plunger mechanism 18, and {LlIHQVZtblQ pre'sser following the description, the appended" i claims, and theseveral ,views illustrated in Q theaccompanying drawings. e

foot2O.-

l The needle mechanism. 10 includes rag re- Figure 3 1s an enlarged top v 10f L" the main presser foot showing the relation" of t the upper'feed dog thereto, '1 1 connections.

driving shaft 12 through the medium ofsuitable driving connections.

The main Presser foot 14 is fixedly secured to the lower portion of the stitching head 9 and cooperating with the underface of said foot is the work clamp 15, the lower feed mechanism 16, and the lower plunger mechanism 18. e 1 7 The lower feeding mechanism 16 includes a feed dog 43 which is of the Jr-motion type and the mechanism for operating this feed dog is substantially identical with that shown in my former Patent 1,588,132, issued June 8,

The work for which this machine is intended includes a base layer A which may be the body fabric of a coat, and a superposed layer B which may be the linin therefor. The lining B has its margin'ale ge portion infolded as indicated at b and this infolded portion is initially secured to the body fabric A by means of a line of basting stitches. The parts thus joined are fed through the sewing machine forming my inventionwith' the marginal folded portion 6 turned-up into a vertical plane. The base layer A is fed through the machine by the direct contact of the lower feeding mechanism 16 and the upturned marginal folded portion 7) is fed throughthe machine by direct contact with I the upper feeding mechanism 17. I

The main presser foot 14 includes arheel 54, a toe 55, and an opening which is located therebetween-and through which the plunger mechanism 18 projects a node of the base' layerlupwardly for engagement by the needle 21. The too is'provided with a longitudinally extending guideway 58 for the upturned folded portion b" of the lining. This guideway extends in the'line of feed and includes a vertical wall 59 which is carried by the toe 55, the wall extendingin the line of feed and being disposed on the right) hand side of the guideway 58. Located on the left hand side of the guideway 58'is the 1;

movable presser foot20 and slidably mounted in this presser foot 20 is a horizontally movable upper plunger 61 which in one direction of itsmovement projects anode of the upturned marginal portion 7) into the path of i the needle 21. V

As above stated, the upper feeding mechanism 17 'co-operates with the lower feeding I 'to the upper feed dog 80, I have provided the mechanism 16 to feed both the upper and lower layers of material in unison. This upper feeding mechanism includes a feed dog 80 which is fixed to a feed bar 81. The feed dog 80 is provided with a series of fabric engaging teeth 82, and this dog is mounted for feeding movements in a horizontal plane, that is, the feeding movements of the upper feed dog are in a plane at right angles to the feeding movements of the lower feed dog, and the feeding surfaces of said dogs are in vertical and horizontal planes respectively. The upper feed dog 80 cooperates with the rear portion of a guiding wall 59 which exf 80, that is, back and forth and in and out, 7

the back and forth movements beingin: the

line of feed whereas the in and out movements are 111 a plane transverse to the line of feed. The feeding movements of the feed dog 80 are in unison with the feed movements" of the lowerfeed dog 43. In order to reciprocate the upper feed dog 80 forwardly and backwardly, I have provided. a vertically extending lever 83 which is fulcrumed on a horizontal axis 84 on the rear face of the stitching head 9 and thelower 'end' of the lever 83 being pivotally connected to the feed bar 81 by right, angle connections 85-86, the former being a horizontal pivot and the latter being a vertical pivot. The upper end of the lever 83 is provided with a segmental slot 87 having an adjustable connection with one end of a pitman or link 88,'the other end of the. pitman" being connected to. an eccentric pin 89 fixed to a shaft 85'which is driven from the main shaft 12 through the medium tends in rear of-the movable presser foot20.

of a gear coupling 36. ,This adjustable con- 1 with the roughened face 93 of the lever 83. A

coil spring-94 is disposed intermediate the disc 92 and the nut 91 and serves to retain the pin 99 in any position of adjustment along. the slot 87. The other end of the pin 90 extends through a slot 95formed in a cover plate 96, and is provided With a finger piece97.

The cover plate 96 encloses the stitch forming mechanism and the top feeding mechanism, and. is supported on the stitching head 9 as shown at 980;, the cover plate being removably locked to the stitching head by means of a clampingscrew 96a. Thus the operator may have immediate access to "the adjustable connection of the upper feeding mechanism'to thereby quickly adjust the feeding stroke of theiupper feed dog 80 whenever desired. Bynneans of the adjustable connection, the pin 90 will be retained automatically inany posi-tionof adjustment; 7

In order to impart in and'out movements feed bar 81 with an upwardly extending cam roller 103 which has direct contact with v a peripheral cam 104 fixed to a shaft .105 journaled in the head 9 and driven from the shaft 12 by suitable connections. A spring. 99a has one end connected to the upper end of the operating lever 99 and the other end connected to the stitching head 9 for yieldably retaining the cam roller 103 in engagement with the cam'104. The cam'104 is formed with opposed high points of equal radius, and inasmuch as the shaft 105 makes one complete rotation to every two complete rotations of the main shaft 12, it will be apparent that the operating lever 99 will be given a complete oscillation during each'complete rotation of the mainshaft 12 It is of course to be understood that the details of structure and arrangements of parts may be variously changed and modified without departing from the spirit and scope of my invention.

I claim:

ister with the adjustable connectionbetween the actuating link and the feed lever, and a manually operable arm fixed to the link and projecting outwardly through the-slot of the cover whereby the feed strokeof the lever maybe varied without removing the cover or the cover removed without interfering with the manually operable means.

In testimony whereof signature.

CHARLES 7W.

1. In a sewing machine. including a stitching head, a top feed mechanism mounted on the head including a feed dog and a lever for imparting feed movements to the dog, and an actuating link adjustably connected to the lever to vary the movement thereof, thecom bination of a cover removably attached to and embracing the stitching head and the top feed mechanism and provided with a slot in register with the adiustable connection between the actuating link and the feed lever,.

and manually operable means connected to said ad ustable connection and projecting I hereunto affix my.

outwardly through the slot of the cover whereby the feed stroke of the lever may be varied without removing the cover or the manually operable means.

2. In a sewing machine including a stitch.- ing head. a top feed mechanism mounted on the head including a feed dog and a lever for imparting feed movements to the dog. and an actuating link adjustably connected to the lever to vary the movement thereof, said adjustable connection including a slot in the lever, a pin carried by the link for engagecover removed without interfering with the ment in the slot of the lever, means for yieldably retaining the link'in any adjusted posi- 7 tion along the slotof the lever, the combina tion of a cover removably attached 'to and embracing the stitching head and the top feed mechanism andprovided with a slot in regf I 

